EP 0922994 B1 20090819 - A photosensitive silver halide element with increased photosensitivity
Title (en)
A photosensitive silver halide element with increased photosensitivity
Title (de)
Lichtempfindliches Silberhalogenidelement mit verbesserter Lichtempfindlichkeit
Title (fr)
Elément photosensible à l'halogenure d'argent ayant une photosensibilité améliorée
Publication
Application
Priority
- EP 98204077 A 19981130
- EP 97203897 A 19971211
Abstract (en)
[origin: EP0922994A2] A photosensitive element comprising a silver halide emulsion having silver halide grains containing an organic hole-trapping dopant. In a preferred embodiment said dopant is represented by formula (I): €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒR-COOM€ƒ€ƒ€ƒ€ƒ€ƒ(I) wherein R is hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aralkyl group or hetero-aryl group, and M is hydrogen or any metal or organic group which can form a salt or by formula (II): wherein : X and Y are independently selected from O, S, Se, m is 1 and n is 1 or 2, R1 and R2 are hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl or aralkyl group or a substituted or unsubstituted heteroaryl group, wherein R1 and R2 may be the same or different and may form a ring, E represents a group linked to the carbon atom by a heteroatom, having at least one free electron pair, M+ is a proton or an organic or inorganic (metal) counterion. Moreover the invention provides a photosensitive element where said photosensitive element can be a photoadressable thermographic element. The invention also provides a method for preparing said photosensitive element comprising a support and on one or both sides thereof at least one silver halide emulsion layer wherein the silver halide grains are doped with an organic hole-trapping dopant according to formula (I) or (II), optionally carried out in the presence of a oxidizing agent.
IPC 8 full level
G03C 1/005 (2006.01); G03C 1/035 (2006.01); G03C 1/08 (2006.01); G03C 1/09 (2006.01); G03C 1/52 (2006.01); G03C 1/66 (2006.01); G03C 1/015 (2006.01); G03C 1/498 (2006.01)
CPC (source: EP)
G03C 1/005 (2013.01); G03C 1/035 (2013.01); G03C 1/08 (2013.01); G03C 1/09 (2013.01); G03C 1/52 (2013.01); G03C 1/66 (2013.01); G03C 1/015 (2013.01); G03C 1/498 (2013.01); G03C 2001/0156 (2013.01); G03C 2001/03511 (2013.01); G03C 2001/03535 (2013.01); G03C 2001/03594 (2013.01); G03C 2200/44 (2013.01)
Designated contracting state (EPC)
BE DE FR GB
DOCDB simple family (publication)
EP 0922994 A2 19990616; EP 0922994 A3 20070110; EP 0922994 B1 20090819
DOCDB simple family (application)
EP 98204077 A 19981130